<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.currentCity}}</div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div
                      class="button-wrapper"
                      v-for="item of hot"
                      :key="item.id"
                      @click="handleCityClick(item.name)"
                    >
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <div
              class="area"
              v-for="(item, key) of cities"
              :key="key"
              :ref="key"
            >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div
                      class="item border-bottom"
                      v-for="innerItem of item"
                      :key="innerItem.id"
                      @click="handleCityClick(innerItem.name)"
                    >
                      {{innerItem.name}}
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
    // 点击事件的时候changeCity事件就被派发,store里面就action就接收这个changeCity和city参数
    //  this.$store.dispatch('changeCity', city)
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>

<style scoped>
     .border-topbottom:before{
         border-color: #ccc;
     }
     .border-topbottom::after{
         border-color: #ccc;
     }

     .border-bottom:before{
         border-color: #ccc;
     }
    .list{
        overflow: hidden;
        position: absolute;
        top: 1.58rem;
        left: 0;
        right: 0;
        bottom: 0;
    }

    .title{
        line-height: .54rem;
        background: #eee;
        padding-left: .2rem;
        color: #666;
        font-size: .26rem;
    }
    .button-list{
        overflow: hidden;
        padding: .1rem .6rem .1rem .1rem;
    }
    .button-wrapper{
        float: left;
        width: 33.33%;
    }
    .button{
        margin: .1rem;
        padding: .1rem 0;
        text-align: center;
        border: .02rem solid #ccc;
        border-radius: .06rem;
    }
    .item-list>.item{
        line-height:.76rem;
        padding-left: .2rem;
    }
</style>
